incorrect 1099-R

I full surrendered an annuity. This was a non-qualified annuity. Upon receiving my 1099-R, I realized that the gross distribution and the taxable amount matched. The after tax contribution were not deducted from the taxable amount. I have requested a correct 1099-R and quite some time has passed and have not received it. The response is the issue is opened and we are looking into it. What if I don't receive it in time for filing deadline. Should I go ahead and file the return based on what I beleive the numbers should be ?

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