How to calculate MAGI (modified adjusted gross income) quickly and easily on my TurboTax tax return? I know I need my AGI and to "add back" certain deductions, but which?

Investopedia ( https://www.investopedia.com/terms/m/magi.asp#toc-calculating-your-magi ) has some information regarding the types of deductions I need to add back, but I am having a hard time locating them. From that particular list, only a few specifically apply to me - for example; IRA contributions perhaps, student loan interest deductions, and perhaps some tuition expenses. Where would I locate these deductions on my tax return to make the MAGI calculation?

I am looking for this number to see if we should be doing a Backdoor Roth conversion because of our income limit this year.

 Thank you.