The IRS agreed with our reported AGI, taxable Income, withheld taxes , but did NOT agree with Line 16 (TAX) on Form 1040-SR. I then manually did the math according to the IRS tax table & taxable income, i.e., so much at 10%, so much at 12%, and even a bit at 22%. My math result matched exactly what IRS' letter said should have been the Line 16 entry. In my mind, TT made a calculation error.
