How to change or add merhcant codes

Hi there don@1sourcemetro,

Thanks for reaching out about your QuickBooks account. QuickBooks online is a great tool able to assist you in keeping track of sales and expenses so you can know the profit of your business. I can point you in the right direction for assistance with this. To best help you with this request, can you please provide some more details as to this merchant ID field, and where you would like it to appear? Thank you.