The Recovery Rebate Worksheet used in the calculations for stimulus in TurboTax uses $150,000 for Married Filing Jointly which is the correct amount for tax year 2020. It also uses the 2020 AGI from the 2020 Form 1040 Line 11.
The TurboTax Recovery Rebate Worksheet is the same as the IRS Recovery Rebate Worksheet as shown in the IRS Form 1040 instructions on page 59 - https://www.irs.gov/pub/irs-pdf/i1040gi.pdf#page=59
