Update Table Field after update in another form

[theinviter]

Dears;

I want a way to Update a field in a table after the user click on check mark in the form.
so I have Check mark Named ( Qny_HQ) in table (MRN) which has a (item_code) and (Location_Code).
and when the user open Response form and click on Check mark (Aknwledge) want to update the check mark (Qnty_HQ) in MRN table.

can you advice me.