<s>[INST] What is intimation under Section 143(1)? [/INST] ​​​Intimation refers to the processing of returns by the Centralised Processing Centre (CPC). In this, all Income-tax returns filed under Section 139 or in response to a notice under Section 142(1) are processed to verify and fix the arithmetical errors, apparent errors, tax calculation, and tax payments. At this stage, no verification of the income is undertaken.​ </s>