Just called hmrc to request tax payment calculation AND sa302...

My husband called to request sa302 and tax payment calculation from HMrC (both of these are required .. We are applying under category f of the financial portion as my husband is a sole trader)
When we called they said the sa302 and the tax payment calculation are the same thing? In the financial portion is says you need both and it seems to sound like they are two separate things.. Can someone help me? Idk if I'm asking for the right paper work as far as tax payment calculation goes... Is tax payment calculation something I can obtain from his accountant or does it need to be from HMRC?
Thank you sooo much!!!