Short answer
For NEET (UG) 2026, the correction window ran from 10 March 2026 to 12 March 2026, after online applications closed on 08 March 2026. The bulletin said corrections would be allowed in only certain fields, to be notified at a later stage; it does not list those fields itself.
Based on the NEET (UG) 2026 Information Bulletin. The 2027 bulletin hasn't been published yet — rules can change, so check it when it is.
Who this applies to
Candidates who have submitted the NEET (UG) application form and paid the fee
The rule, explained
Outside the correction window, details cannot be changed. The bulletin says the information in your form becomes final and non-editable once you pay the fee and the Confirmation Page is generated. NTA will not consider any request for change except in the permitted fields during the correction window.
Appendix X of the bulletin says choices such as the exam centre city and the medium of the question paper cannot be changed later, except when the window for correction in all fields opens.
What the official document says
Correction in Particulars 10 March 2026 to 12 March 2026
National Testing Agency (NTA) · Information Bulletin for NEET (UG) – 2026, PDF page 7 (opens the official site)
Corrections in only certain fields will be permitted during the stipulated correction window period which will be notified at a later stage.
National Testing Agency (NTA) · Information Bulletin for NEET (UG) – 2026, PDF page 13 (opens the official site)
Any request for change in these particulars will not be considered by NTA under any circumstances except in the permissible fields during stipulated correction window period.
National Testing Agency (NTA) · Information Bulletin for NEET (UG) – 2026, PDF page 14 (opens the official site)
Particulars filled in Application Form need to be chosen carefully as options once exercised cannot be changed later including Examination Centre city and Medium of Question Paper except when the window for correction in all fields opens.
National Testing Agency (NTA) · Information Bulletin for NEET (UG) – 2026, PDF page 115 (opens the official site)