UAE-VAT

Dear All,  in one of case of de-registration, which was voluntarily registered, for the 12 months of 2018, the entity dint have any turnover but was expecting that the same would exceed the limit within next 30 days so they dint de-register, but post that in next 12 months the turnover dint exceed the voluntary limit in 12 months hence applied for de-registration. but now we have received following reply from FTA "Provide declaration letter on the company Letterhead that indicates you will not reach MANDATORY threshold in next month. /// change date to 01/01/2019 Please click on the following link to access your registration form and update the form with the requested information" If the above the date is changed, please clarify if there would be any penalty?? Has anybody encountered the same as above and have got penalty??