Edit multiple items: HttpPost not working

I'm constructing this view where the user can edit multiple item and save one at the time with the 'Update' button.

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Problem: I have trouble making the 'Update' button work. Here is the post method:

The idea is to pass the ID of the row that is being edited and save the changes, that's why there is a button for each row. Here is the code for the POST method:

[HttpPost, ActionName("Test")]

public async Task<IActionResult> TestPost(int id)
{

var machinetoUpdate = await _context.Machines
.SingleOrDefaultAsync(s => s.Id == id);
if (await TryUpdateModelAsync(
machinetoUpdate,"",
s => s.MchName, s => s.StoreID, s => s.PUnit, s => s.Status))
{
try
{
await _context.SaveChangesAsync();

}
catch (DbUpdateException)
{
ModelState.AddModelError("", "Unable to save changes. " +"Try again, and if the problem persists, " +"see your system administrator.");
}
return RedirectToAction("Test");
}
return View(await _context.Machines.AsNoTracking().ToListAsync());
}

When I hit the 'Update' button, the table refreshes but with the original data, with no changes recorded. In some point in the POST method this is not working, but I don't receive an explicit error .

This is the code for the view:

@model IEnumerable<Application.Models.Machine>
@{
ViewData["Title"] = "Test";

}

<h2>Management</h2><hr /><table class="table" asp-action="Test"><thead><tr><th>Serial</th><th>Tienda</th><th>Precio por Jugada</th><th>Estado</th><th>Update</th></tr></thead><tbody>
@foreach (var item in Model)
{<tr><td><div class="form-group"><div class="col-md-10"><input asp-for="@item.MchName" readonly class="form-control" /><span asp-validation-for="@item.MchName" class="text-danger"></span></div></div></td><td><div class="form-group"><div class="col-md-10"><select asp-for="@item.StoreID" class="form-control" asp-items="ViewBag.StoreID"><option value="">-- Seleccione Tienda --</option></select><span asp-validation-for="@item.StoreID" class="text-danger"></span></div></div></td><td><div class="form-group"><div class="col-md-10"><input type="number" max="10" step=".1" asp-for="@item.PUnit" class="form-control" /><span asp-validation-for="@item.PUnit" class="text-danger"></span></div></div></td><td><div class="form-group"><div class="col-md-10"><select name="Status" asp-for="@item.Status" class="form-control"><option value="0">Operativo</option><option value="1">Nuevo Item</option><option value="2">Reparación</option></select><span asp-validation-for="@item.Status" class="text-danger"></span></div></div></td><td>
@using (Html.BeginForm())
{
@Html.AntiForgeryToken()<input type="hidden" value="@item.Id" name="Id" /><input type="submit" value="Update" />
}</td></tr>
}</tbody></table>

Any help and what I might be doing wrong in the Post Method is welcome. Thanks in advance