Q: How to keep track of/align earnings & interest for both US & UK tax year?

Hi
Any apps or other online recommendations to keeping track (very simply) of both UK and US tax years for earned income (and for bank interest)? Its so annoying that the tax years are different.

I used to print out all paid invoices (for freelance income) or income summaries (for employed income), and write  "US tax year xxxx" in one corner, and "UK tax year xx" in the other corner. And then check/tick it when it was reported.

As I no longer print things out... How do others keep track of which country's tax year your income is relevant for? This year, I just checked my credits in bank account, and wrote it out for myself by hand.

Thanks in advance.

Nothing special, I just use spreadsheets, but our income is pretty simple these days, consisting of pensions, interest, dividends and some capital gains.

For the IRS return I track the gross income from my UK pensions and interest income on a month by month basis and report calendar year totals, not those figures from P60s.

For the HMRC returns I have always just used our 1099s for my US pensions, dividends and interest with a statement that for foreign tax calculations the US calendar tax year will be considered as co-concurrent to the UK tax year. For the sale of US shares I don't sell any before April 5th each year just to keep it simple. I use the P60 figures for the UK pensions.

I use an Excel spreadsheet and track everything that way - with a date column and then two other columns (with formulas) one for the US tax Year and one for the UK - that read the date and indicate which tax year the income or expense falls into - it's easy then to apply filters to see which figures are needed for respective tax returns.

Helps if you're a bit on an Excel geek! 

I use the HMRC exchange  rate for my single annual 401(k) payment
I add up all the income from interest for the calendar year and use the average IRS exchange rate. For 1116, I take the figures from my most recent HMRC SA. I’m still working and file a 2555 for earned income