capital gain jointly and re invest single assesee

hello experts i have one client who sale his plot of land in financial year 2018-19 which is jointly registered name with his wife so now they sale so I compute ltcg and decide 1/2 between them but now assesee reinvest and buy one residential house on his own name alone so I give him exemption under section 54 f but not any exemption given his wife so assessed has capital loss and wife has capital gain as per my opinion i compute accurate please suggest me m doing right or wrong actually m fresher so more conscious and afraid of mistakes about all this topics thank u advance for everyone who help me a lot for everyday my query