I need to fill out my AGI from my 2022 return, I sent in 2021 returns on paper and the number is not a whole dollar amount, can I round this # ?

Your AGI on your 2022 is line 11 of your 2022 1040SR tx return or a similar line number by label on your 2022 1040 tax return!

Yes you should round it.  (Down if .49 or lower, up if .50 or higher)

A lot of the numbers you're inputting should be rounded.  I'm not a tax prep professional, just noticed over the years that no matter what you type into TurboTax, it's usually rounded to the nearest dollar when you see it printed out later.

Yes round up though.

Yes re AGI just round it up or down to nearest dollar amount:

So $49,000.49 would be $49,000 & $49,000.51 would be $49,001.  :~)