Yes, ITR 2 is correct.
-You just need to check the amount of TDS refund calculated correctly.
-Yes, there will be additional cost for ITR review.
- You need to pay the applicable fees for late filing.
-The quantum of fees that can be levied under section 234F of income tax act 1961 for FY 2018-19(AY 2019-20) filing is as under :
(i) If the return is furnished after 31st August but on or before the 31st day of December of the assessment year - Rs. 5000 (i.e 31st August, 2019 and 31st Dec, 2019 for FY 2018-19)
(ii) If the return is furnished after 31st December of the assessment year (1 Jan - 31st March) - Rs. 10,000
-Late fees under section 234F can be paid by the way of "Self Assessment"---> "Others", this penalty can be paid from FY 17-18 and onwards.
Challan No. 280
Type of payment - Self assessment (300)
Fill 234 F amount in column "Others".