Bad circular dependency in the US 1040 that never ends

There seems to be a bad circular dependency in the US 1040 that never ends:

Form-1040 Line 10b, and therefore 10c, depend on Sched-A line-11 (if you do not itemize). Sched-A line-17 (determines if you itemize) depends on Sched-A line-4. Sched-A line-4 depends on Sched-A line-2, which comes from Form-1040 line-11. But Form-1040 line 11 depends on Form-1040 Line-10c (which re-starts the calculation above).

So here is what happens for me:

L9 = 57,780 L10a = 50

First, L11 = 57,730 (initial estimate based on L9 - L10a) A1 = 4,380 A2 = 57,730 A3 = 4,329 A4 = 50.21 A6 = 5,160 A7 = 5,160 A11 = 300 A14 = 300 A16 = 20,585 A17 = 26,095 Since A17 < 26,100 (our std.deduction), So I use the Std.Deduction and don't itemize. L10b = 300 (since I am not itemizing) L10c = 350 So, L11 = L9 - L10c = 57,430 (Notice that L11 goes UP BY $300.)

So this makes me need to recalculate Schedule-A, since A2 has changed.

Second time through, L11 = 57,430 A1 = 4,380 A2 = 57,430 A3 = 4,307 A4 = 73 A6 = 5,160 A7 = 5,160 A11 = 300 A14 = 300 A16 = 20,585 A17 = 26,118 Now A17 > 26,100 (our std.deduction), So now better to itemize. L10b = 0 (since I am now itemizing) L10c = 50 So, L11 = L9 - L10c = 57,730 (Notice that L11 went DOWN BY $300.)

Now I have to recalculate Schedule-A again, since A2 has changed again !!

It keeps changing by +/- $300 no matter how matter how many times I do it.

Am I missing something ??? TurboTax just hangs and crashes on me here.

What is recommended in this situation ?

Thanks !!