@Michael Tamoush
There isn't really a native way to check a box on a record before saving it. If this record is being added as a child record, or from somewhere where you have control over the sending URL, you could use the "?a=API_GenAddRecordForm" action paired with the URL Parameter to set the value of specific fields, for example "&_fid_21=1" where 1 = checked and 0 = unchecked.
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Justin Torrence
Quickbase Expert, Jaybird Technologies
jtorrence@jaybirdtechnologies.com
https://www.jaybirdtechnologies.com/#community-post------------------------------