1.You can go to the Setting section from the top right corner and then click on ‘Settings’ and then click on ‘ Company’.
2.You can choose ‘Company details’ to update logo.
3.You can choose ‘Invoice details’ to add digital signature, mobile, email,etc.
4.You can also Go to ‘Tax & Compliance’ and add details like tan number, pan number, GSTIN by clicking on edit details