As per section 206C(7), interest for delay in payment of TCS should be paid before filing the TCS return. Interest for non-payment of tax as per demand notice Before understanding the provisions for levy of interest in case of non-payment of tax demanded as per demand notice issued under section 156(1), it is important to first [As amended by Finance Act, 2020] understand the provisions of section 220(1) relating to payment of tax as per demand notice. As per section 220(1), when a demand notice under section 156(1) has been issued to the taxpayer for payment of tax (other than notice for payment of advance tax), then such amount shall be paid within a period of 30 days of the service of the notice at the place and to the person mentioned in the notice. In certain cases, the above period of 30 days can be reduced by the tax authorities with the approval of designated authorities. Section 220(2) deals with payment of interest in case of failure to pay tax within the time specified in the demand notice. As per section 220(2), if the taxpayer fails to pay the amount specified in any notice of demand issued under section 156(1) (as discussed) within the period as allowed in this regard, then he shall be liable to pay simple interest at 1% for every month or part of a month. Interest shall be levied for the period commencing from the day immediately following the end of the period mentioned in the notice and ending with the day on which the amount is paid. After processing of TDS/TCS statements an intimation is generated specifying the amount payable or refundable. Such intimation shall be deemed as notice of demand under Section 156. Failure to pay such tax specified in intimation shall attract interest under Section 220(2). It is provided that where interest is charged under sub-section (1A) of section 201 on the amount of tax specified in the intimation issued under sub-section (1) of section 200A for any period, then, no interest shall be charged under Section 220(2) on the same amount for the same period. It is also provided that where interest is charged under sub-section (7) of section 206C on the amount of tax specified in the intimation issued under sub-section (1) of section 206CB for any period, then, no interest shall be charged under sub-section (2) on the same amount for the same period