FDR in same branch shall be merged
Although if bank merge the accounts but the liability to deduct tax is branchwise so, it should not affect TDS matter
Text from 194A
[(i) where the amount of such income or, as the case may be, the aggregate of the amounts of such income credited or paid or likely to be credited or paid during the financial year by the person referred to in sub-section (1) to the account of, or to, the payee, 50[does not exceed—
(a) ten thousand rupees, where the payer is a banking company to which the Banking Regulation Act, 1949 (10 of 1949) applies (including any bank or banking institution, referred to in section 51 of that Act);
(b) ten thousand rupees, where the payer is a co-operative society engaged in carrying on the business of banking;
(c) ten thousand rupees, on any deposit with post office under any scheme framed by the Central Government and notified51 by it in this behalf; and
(d) five thousand rupees in any other case]:]
"
Provided that in respect of the income credited or paid in respect of—
(a) time deposits with a banking company to which the Banking Regulation Act, 1949 (10 of 1949) applies (including any bank or banking institution referred to in section 51 of that Act); or
(b) time deposits with a co-operative society engaged in carrying on the business of banking;
(c) deposits with a public company which is formed and registered in India with the main object of carrying on the business of providing long-term finance for construction or purchase of houses in India for residential purposes 53[and which is eligible for deduction under clause (viii) of sub-section (1) of section 36] 54[***],
55[* * *] the aforesaid amount shall be computed with reference to the income credited or paid by a branch of the banking company or the co-operative society or the public company, as the case may be;]"