Hi I'm trying to verify my modified adjusted gross income. What's the best way to do that as I'm unclear on things that should be added to my adjusted gross income.

The MAGI for what exactly?  There are many unique types of Modified AGI that are used on a tax return.

MAGI For my wife and I's income. We're trying to verify MAGI for our retirement accounts. 

For Traditional and Roth IRA's -

Go to IRS Publication 590-A page 15 Worksheet 1-1 for a MAGI on a Traditional IRA -  https://www.irs.gov/pub/irs-pdf/p590a.pdf#page=15

Go to IRS Publication 590-A page 39 Worksheet 2-1 for a MAGI on a Roth IRA - https://www.irs.gov/pub/irs-pdf/p590a.pdf#page=39