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change tax for er4940 samsung?

I have a er4940 Samsung cash register and need to change the sales tax.
ron lewis, March 2016
I haven't worked with that model. There is a manual on the net though:

https://the-checkout-tech.com/manuals/cashregisters/Samsung_ER-4940_dealer_pocket_programming_guide_manual.html

Registerman, April 2016
link Click here to see other fixes for Samsung.