several other options but the best option is an attorney
1) after he files and the return is fully processed, you can get a copy of the return by filing form 4506 or a transcript by filing form 4506-T. Getting a transcript online may not be possible because you'll lack the needed information
2) you can deny your spouse the right to file a joint return, but then you would have to file your own return with filing status Married Filing Separately. It would then be illegal for him to file a joint return without your consent
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