Dependent mistake

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Member Posts: 1 Newcomer
My now 18 year old son did his own taxes and accidentally checked the box that no one could claim him as a dependent for last year. Now my tax return is being rejected because of it. We went through and amended his return so it is proper now. Is the only option for me to mail in my tax returns now or should I file for an extension while hopefully they get his amended return processed?
Thanks
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