Annualized income installments

[Sam163]

In the Instructions for Form 2210 to calculate the penalty, Schedule A1, Part I, line 22:

I don’t understand  the meaning of “total of the amounts in all previous columns of line 27”
What does “previous columns” refer to?

Thank you for your answer.

[dmertz]

"Previous columns" refers to the columns to the left of the column in which you are making an entry.  

Line 22 column (b) = Line 27 column (a)

Line 22 column (c) = Line 27 column (a) + Line 27 column (b)

Line 22 column (d) = Line 27 column (a) + Line 27 column (b) + Line 27 column (c)

TurboTax does this for you.

[Sam163]

Than you!