How to Add TAX No in Sales and purchases invoices

Dear Sir,

Now in UAE January-2018 onwards VAT will be coming . how to Add TIN No ( TAX No) in sales and purchases invoice in ERP.Next.

Hi

Sales invoice list you choose Menu -> Customize. Will go to Customize Form page.
Customize Form page you can add new field.

Dear Sir,

i choose what you said-Sales invoice list you choose Menu -> Customize. Will go to Customize Form page.
Customize Form page , where is New Field and please send screen shot of new field

Hi

You can see this video