Dont visit Immigration in the next 10 days might work but does not solve your problem.
There is no 90 day visit needed to a Non Immigrant B visa, but I guess you have already a big stamp from Immigration with the text Extension of Stay permitted up to ../../.. and therefor you need to notify that you are 90 days inside Thailand.
If you already done this once at Immigration, you can do this by using the on line system
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