when trying to add a not ,where you usually type the delete icon is in the place on the screen where you usually type and when you start typing the line disappears,the weird thing is if we replicate this on the laptop it works !!
Odoo is the world's easiest all-in-one management software.
It includes hundreds of business apps:
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Please refer the below link https://www.cybrosys.com/blog/how-to-add-sections-notes-subtotals-in-a-quotation-using-odoo-16-sales