Hope you are doing well !
Please find below the replies :
1. You must open current account as Current Account is generally for business/Start up purposes and banks pay no interest on the balances held therein but such type of accounts can be helpful to have Overdraft Limits against security or can have a clean (i.e. without any security) overdraft limit. There is no binding of number of transactions in such type of accounts. .
2. Whatever you want to open-PayPal/Payoneer account as such no restrictions.
3. Income Tax Returns to be filled annually depends on your status i.e.
The due dates to file income tax return can be divided into two parts.
(a.) Individuals, HUF, BOI, AOP. (Taxpayers with no audit requirement.) - 31st July of the relevant AY
(b) Company, Taxpayers whose accounts need to be Audited, Working partner (whose firm’s books need to be
Audited)-30th September of the relevant AY
4. Please explain further as didn't get this point.
Including above, you need to know followings things also:
(a) Apply for GST registration once your turnover reaches above 20 Lakh.
(b) Maintain records of all transactions for domestic as well as foreign transactions
Thanks & Regards,