Long-stay visa equivalent to a residence permit (VLS-TS) online validation!
If you arrived in France with a long-stay visa equivalent to a residence permit (VLS-TS) valid from 6 to 12 months, you must have it validated by the Office français de l’immigration et de l’intégration (OFII) upon arrival.
From February 18th 2019, the validation procedure is now made online using the following website: https://administration-etrangers-en-france.interieur.gouv.fr/particuliers/#/
The OFII may call you in for a meeting to carry out further formalities if required, such as have a medical check-up and/or sign an integration contract.
If you want to remain in France at the end of the validity period of your VLS-TS, you must apply for a residence permit at the prefecture of your place of residence within the two months prior to the expiry date of your visa.