A contribution to a ROTH IRA will have no impact on your tax obligation. So if you want to e-file, you'd better do it immediately (it is 10.30pm here in California). Now if you meant a contribution to a Traditional IRA, that would be different. Actually, no it wouldn't, sorry. Because you couldn't possibly deposit the contribution by midnight 10/15/2019. My suggestion is to e-file immediately. Then amend if there is something that could change your obligation. But I don't think there is unless you've got NOL being carried forward from a prior year.
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