Income tax applicability

Dear,

You are not taxable and whenever you can recive the amount from your sister.

If your father already paid the income tax of this amount, then you are free for any tax either the condition different, then you have to pay tax according the amount.

According government rule:

2.5 lacs amount tax free.

2.5 lacs to 5 lacs amount,10% tax

5 lacs to 10 lacs amount, 20% tax

thus you are receive 4.90 lacs then pay 49,000/- for tax.

There are no issue to receive the amount in single or multiple cheques.