You can do whatever you want. You can even submit a final return for filing using wage info estimated from a final pay stub, or even earlier. However, this is a very bad idea, because if your information is mis-matched,you will get a letter from the IRS, your refund could be delayed, and you would have to file an amended return that takes 6 months to process. Check out the complaints here in March from people who rushed and made mistakes and now are suffering delays.
You can certainly put estimated information in your file now to see what your tax situation is likely to be, but be very careful to replace it with the correct information after you receive your final tax documents and before you file.
Also, there is a new law that specifically delays refund returns containing EIC or the Additional Child Tax credit, until at least February 15, to give the IRS more time to verify tax returns against wage and income data from employers to reduce fraudulent claims. So there's no point in filing an EIC or ACTC return early, and a real risk that if your information doesn't match the IRS records, your entire refund will be delayed for a full investigation.
*Answers are correct to the best of my ability at the time of posting but do not constitute legal or tax advice.*
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