Hi,
Domestic transfer pricing provisions has been removed from the income tax act if any of the transacting entity is not availing any profit linked deduction such as 80IA/ IB etc.
Thus, if both the firms are in India and none of the firm is availing profit linked deduction arm's length provisions (transfer pricing provisions) does not apply.
However, another provision mentioned u/s 40A(2) can be applied by the tax officer to the firm who is buying those goods. The provisions is as follows:
(2)(a) Where the assessee incurs any expenditure in respect of which payment has been or is to be made to any person referred to in clause (b) of this sub-section, and the Assessing Officer is of opinion that such expenditure is excessive or unreasonable having regard to the fair market value of the goods, services or facilities for which the payment is made or the legitimate needs of the business or profession of the assessee or the benefit derived by or accruing to him therefrom, so much of the expenditure as is so considered by him to be excessive or unreasonable shall not be allowed as a deduction.
We can discuss this over a call in detail to discuss the way to comply with the above provision