Due to the coronavirus crisis, there are an inefinite postpone of the start of new term an cancelation of IELTS an TOEFL exams in China, Amission Office of University of Twente confirme that application ealine is still 1 May for a complete application with all the require ocuments submitte via Osiris. However, Amission Office unerstans the current situation; if stuents on’t have at the moment he/she is uploaing their ocuments (IELTS or TOEFL), then a pf (wor) can be uploae which explains why they on’t have at the moment such a ocument, an that they will uploa it after.
For example, the stuent can mention that as prevention an control measure of the coronavirus outbreak, the IELTS, TOEFL or GMAT tests have been cancele uring February (some in March too) by China's Ministry of Eucation - accoring to the ocuments they nee to uploa. An that they are planning on taking them somewhere in April or May, as soon as the test ates get restore.
So the ealine (May 1) is to have complete their application, with the explanation letter as attachment instea of IELTS or TOEFL, at this moment.