1.6 How often do you meet? - I would put every weekend, but seeing as she will be in the US, I don't really know what to put on here. Perhaps put on the weekend and expand in appendix 5?
I would just put 'every weekend'... it's not a trick question. They just need to know you are not in a sham or forced relationship.
1.8 How do you keep in touch with your sponsor? - Again, we see each other every weekend but when she is in US, it will be through calls and whats app.
So, put that.
For example:
'In person every weekend when she is in the UK, then by calls and WhatsApp when she is in the US'
1.19 Have you lived with your sponsor in a relationship akin to marriage or a civil partnership at any time (including since your wedding or civil partnership ceremony)? - My partner has changed all her addresses for any correspondence in the UK to my address for the last month. So we are thinking of putting down that we lived together briefly for one month prior to her moving to the US. Then further expanding saying, although she was in the UK during our relationship, it was not possible to live together because we worked in different cities and she also had an 18 month tenancy agreement.
If you haven't actually lived together legally (as in both of you having permission from the landlord to live in the property), then put no.
Again, it's not a trick question and there is no requirement to have lived together.
1.25 Do you and your sponsor have any shared financial responsibilities? - We have two joint bank accounts but I take it that this does not count as a responsibility?
It's up to you. Personally, I think they mean things you are both legally responsible for paying... such as a mortgage, joint loan or credit repayments.
However, some people put things like rent and bills.
2.8 Do you intend to work in the UK? - She will state that she intends to do a similar job as to what she was doing prior to leave the UK. This should be sufficient, they should have her previous visa details on file that shows it's easy for her to obtain employment due to being skilled worker. Thinking this could help her.
Yes, that's fine to put, but the answer will have no affect on her visa at all, as UKVI are not allowed to consider her employability in the UK.
3.3 From the list below, please indicate the main method of meeting the financial requirement. - I will select, income from salaried employment in UK which is box "complete part 3A" and then also select "category A" for 6 months of continuous employment with same employer.
That's correct.
3.10 What is the address, phone number and email address of your sponsor’s employer? - I will give the name and address. As for email address and phone number, whose email address and phone number should I put down here? Reception or HR? Will they be contacting my employer, in that case, I will put down the HR phone number and the HR manager's email address. I will also need to let HR know that they may get a call from them. It also asks for cellular number. Whose number should be put down here?
They don't usually contact the employer (I've only heard of it happening once or twice out of thousands of applications). It's really up to you. I think, personally, I might put the contact number and email address of my direct line manager, since I work 250 miles from my company's headquarters and HR.
Once this is all complete, all the other sections will be left blank as they're not applicable to me. e.g. 3C, 3D, 3E, 3F and part 4.
That's correct.
Part 5 is continuation and additional information - We want to just add bit more details about my partner and mention how she's been in the UK for the last 3 years, starting off on Tier 4 visa and then moving to tier 2 and now applying for spousal visa.
I wouldn't bother, personally - all that information will be in her application form already, and I assume you will be mentioning it in your sponsor letter (when you talk about your relationship timeline). Plus, she can mention it in a cover letter if she is including one.
So, I'd leave part 5 blank, or use it to finish any questions you didn't have enough room to complete in the other sections.