In addition to the dates, keep in mind that the payment for the visa right cannot be made with a credit card, only in cash or with a debit card.
Consider that at the time of the interview your passport must be valid for at least six months.
Cost
As of July 17 of this year, the visa application fee increased. For visitors and other non-immigrant visa categories it costs $185; certain petition-based nonimmigrant visas for temporary workers (categories H, L, O, P, Q, and R) have a fee of $205.
Visas for treaty trade (E-1), treaty trade investors (E-2), and treaty applicants in a special occupation (E-3) visas cost $315.
The US government points out that those who paid for the visa application before the increase came into force are not charged any additional fee.
visa types
Just as there are various reasons why a person wants to go to the United States, the government also grants different types of visas.
In this category there are three types that can be processed: business (B-1), tourism or leisure (B-2) or a combination of both (B-1/B-2).
For the B-1, the permitted activities are consultations with business partners, attending conferences. Work or educational conventions; also settle an inheritance or negotiate a contract; it also applies to work as a domestic employee.
While for the B-2 activities, vacation trips, visiting friends or relatives, following a medical treatment are allowed; as well as participate in social events, in cultural and sports activities at an amateur level (without receiving payment for it) and enroll in short-term activities, for example, a two-day course or some class that can be taken during vacations.
If what you want is to work in the US, you will have to request a different type of visa, depending on the activities you are going to carry out.
There are visas for temporary employment (H, L, O, P and Q).
Exchange visitor (J) visas are for some teachers, summer workers, and anyone who participates in an exchange program.
Means (I). For members of the media, press and radio.
Trader (E-1) and investor (E-2). For workers from countries with which the US has trade and navigation agreements, including Mexico, as well as for those who work in companies that invest in the country.
Agricultural (H-2A) and non-agricultural (H-2B) workers. For those looking to work in agriculture, construction and other industries.
Students (F and M). To carry out academic and vocational studies in the US.
Visas to migrate to the United States for having a family member living in the country and for those seeking permanent employment.
Traffic (C). For those who are going to travel to another country and have to go through the US.
Diplomat. For workers who will represent a foreign government in the US (A), employees of international organizations (G and NATO) and foreign military based in the US (A-2 and NATO).
Religious workers (R). It is for those who work for a religious organization and will work in the United States.
Crewman (C-1/D). For those who are part of the crew of a ship or plane.
Humanitarian visas. For refugees and other humanitarian reasons.