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My wife and I are filling out the N-400 application online for her.  She is applying on the basis of being a LPR for 5 years.  For required documentation, we were asked to submit a copy of her green card and a copy of our marriage certificate.  For additional documentation, we are submitting tax return transcripts and tax account transcripts for the past 5 years (2018-2022).  Are there any other documents besides the tax transcripts that would be good to submit for additional documentation?

Thanks.  Your response was helpful.  I've now only included the tax return transcripts, and I went ahead and highlighted our names on our supporting documents.
 
We submitted our package today to Lewisville, TX.  The wait begins!